Turbo back to NA/Nitrous. 434ci sleeved stroker LSx build.
02-12-2012, 06:24 AM
#1
Turbo back to NA/Nitrous. 434ci sleeved stroker LSx build.
Now that most of my parts are in I can finally start posting about my latest(and last) build. My original build was a stock LS2 engine with a cam and a 125 shot and it was a lot of fun to drive and beat the **** out of. Then I decided to go turbo and that is pretty much where the fun ended. The made too much power and was no longer enjoyable (or much faster...traction) to drive. So after 2 years with the turbo setup I decided to take it down a notch(in a sense) and once again have a car that was fun to drive and in the end will actually end up being much faster with more usable hp. My NA/nitrous setup made 398NA/503Nitrous whp. This new setup will make around or over 600whp NA and who knows how much on a twin stage 300 
. My current setup is:
434cubic inch(7.2L) ERL sleeved LS block 11.8:1 compression
Trickflow 245cc TEA CNC ported heads with the 290cfm "nitrous" exhaust port
YT 1.7 Shaft rockers
Custom 262/266 cam(if anyone knows anything about LS cam sizing knows how big this thing is)
Fast 102/102 intake/TB
60#injectors
CJs twin 255s to replace my extermal pump setup(which worked awesome but I was tired of it being louder than my exhaust..and just about everything else)
Fast Intentions AXLE BACK mufflers. I will be doing a 3" X pipe off the headers with twin 3" cutouts after the headers before the dual 2.5" exhaust.
Ceramic Mcleod twin disc(this one is the correct size and wont blow my engine)
Some form of plate and direct port nitrous.
And a lot of the parts carried over from the previous build.
I don't have many pics yet but heres what I have. The block is beautiful. I almost want to put it in a glass case and just look at it a lot. The new block replaces the cast thin sleeves with ductile iron thats 3x thicker at max bore than factory. A quick glance at the block shows just how much thicker these sleeves are. Im running wiseco -3cc pistons (4.155"..had to go this big to run the trickflow 245s) callies rods/crank head/main studs.
. My current setup is:434cubic inch(7.2L) ERL sleeved LS block 11.8:1 compression
Trickflow 245cc TEA CNC ported heads with the 290cfm "nitrous" exhaust port
YT 1.7 Shaft rockers
Custom 262/266 cam(if anyone knows anything about LS cam sizing knows how big this thing is)
Fast 102/102 intake/TB
60#injectors
CJs twin 255s to replace my extermal pump setup(which worked awesome but I was tired of it being louder than my exhaust..and just about everything else)
Fast Intentions AXLE BACK mufflers. I will be doing a 3" X pipe off the headers with twin 3" cutouts after the headers before the dual 2.5" exhaust.
Ceramic Mcleod twin disc(this one is the correct size and wont blow my engine)
Some form of plate and direct port nitrous.
And a lot of the parts carried over from the previous build.
I don't have many pics yet but heres what I have. The block is beautiful. I almost want to put it in a glass case and just look at it a lot. The new block replaces the cast thin sleeves with ductile iron thats 3x thicker at max bore than factory. A quick glance at the block shows just how much thicker these sleeves are. Im running wiseco -3cc pistons (4.155"..had to go this big to run the trickflow 245s) callies rods/crank head/main studs.
Last edited by SnyperZ; 02-12-2012 at 06:51 AM.
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02-12-2012, 09:47 AM
#8
Passed emissions. Its a plug in test. Last time I did it however I got a call from a DMV investigator and he actually came out to my house. The ECU is out of an 05 GTO and when they scanned that and my VIN it threw up a red flag. He came out to the house and checked for a cat and then did a plug in right in the driveway and everything was fine.
03-05-2012, 11:26 AM
#16
Finally started to put the engine together last night. I would of had the engine and trans in the car if I didn't spend 3 hours modifying the oil pan and windage tray and getting the correct depth for the pick up tube. I might put the rest of it together if I feel motivated. Here are a few pics of the engine..
You can see here just much much thicker the new sleeves are compared to the stock ones.
TFSs biggest head. "Nitrous" ported by TEA. These things flow incredible numbers..
Black kevlar braid fuel line...Looks much nicer and much less painful to make than stainless braided.(no puncture wounds in my fingers) I also replaced the double roller timing chain for a C5-R single roller.
You can see here just much much thicker the new sleeves are compared to the stock ones.
TFSs biggest head. "Nitrous" ported by TEA. These things flow incredible numbers..
Black kevlar braid fuel line...Looks much nicer and much less painful to make than stainless braided.(no puncture wounds in my fingers) I also replaced the double roller timing chain for a C5-R single roller.
Last edited by SnyperZ; 03-05-2012 at 11:29 AM.
